How do I fix code P0128?

How do I fix code P0128?

What repairs can fix the P0128 code?

1. Replacing the thermostat (most common repair)
2. Replacing the coolant temperature sensor, or the wiring and connector associated with the sensor being damaged.

Can I drive my car with a P0128 code?

You may drive your vehicle with a P0128 trouble code. You will not notice any issue except for maybe the temperature gauge never reaching normal levels, and possibly the Check Engine light being illuminated.

Where is the thermostat on a 2002 Pontiac Grand Am?

Follow your top radiator hose back to the engine where it ends is thermostat housing there should be bolts that mount it to engine. Remove the 2 bolts and pry up on the housing and thermostat will be underneath it.

How long can you drive with a P0128 code?

Note: It can be easily said that one can drive at least 500 miles even having problems with the P0128 error code. Still, it is not safe to drive more than 1000 miles.

What is the code for a bad thermostat?

While there is a small chance that there is an issue with the running temperature of your engine, by far the most common issue with trouble code P0128 is a faulty thermostat. The exact location of the thermostat and issues related to a damaged thermostat may vary depending on your vehicle.

What can a faulty coolant temp sensor do?

If the coolant temperature sensor goes bad it can send a false signal to the computer and throw off the fuel and timing calculations. It is not uncommon for the coolant temperature sensor to fail and send a permanently cold signal to the computer. This will reduce fuel economy, and may hinder engine performance.

How do you test a coolant sensor?

If you have a new sensor on hand and want to check it, you can do this easy test. Connect the black lead of the meter to the body of the cold sensor and the red to the terminal. You should have a reading of approximately 2000 ohms. Check the warm sensor in your engine.

What causes rough idle on startup?

Causes of a rough idle. Many different problems could result in a rough idle for your car or truck, including: dirty fuel injectors, clogged air filters, bad spark plugs, and a variety of exhaust system issues.

How do you fix a rough idle when AC is on?

Here is the procedure of fixing rough idle when AC is on:

1. Open the car hood.
2. Access the throttle body.
3. Have a friend or colleague turn the key to the “On” position, but don’t start the car engine.
4. Request the helper to slowly press on the accelerator.
5. Next is to spray the throttle body cleaner on a rag and or cloth.

Can a bad fuel injector cause a rough idle at startup?

Rough Engine Idle: One of the most common symptoms of faulty fuel injectors is an extremely violent or rough engine idle. If fuel is not properly provided to the engine cylinder, it will result in a choppy engine, when the car is in idle.

How do I know if my fuel injectors are stuck?

The symptoms of a stuck-open or incompletely closing fuel injector are quite different than an injector that is completely dead or partially clogged. In this case, there may be an odor of unburned fuel in the engine compartment, coming through the vents, or even out of the tail pipe.